mirror of
https://github.com/f4exb/sdrangel.git
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640 lines
21 KiB
C++
640 lines
21 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2022 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <QDebug>
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#include "dsp/datafifo.h"
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#include "dsp/basebandsamplesink.h"
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#include "util/messagequeue.h"
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#include "maincore.h"
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#include "m17modprocessor.h"
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#include "m17modsource.h"
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const int M17ModSource::m_levelNbSamples = 480; // every 10ms
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const float M17ModSource::m_preemphasis = 120.0e-6; // 120us
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M17ModSource::M17ModSource() :
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m_channelSampleRate(48000),
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m_channelFrequencyOffset(0),
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m_modPhasor(0.0f),
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m_audioSampleRate(48000),
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m_audioFifo(12000),
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m_feedbackAudioFifo(48000),
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m_levelCalcCount(0),
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m_peakLevel(0.0f),
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m_levelSum(0.0f),
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m_ifstream(nullptr),
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m_preemphasisFilter(m_preemphasis*48000)
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{
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m_audioFifo.setLabel("M17ModSource.m_audioFifo");
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m_feedbackAudioFifo.setLabel("M17ModSource.m_feedbackAudioFifo");
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m_audioBuffer.resize(24000);
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m_audioBufferFill = 0;
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m_audioReadBuffer.resize(24000);
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m_audioReadBufferFill = 0;
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m_audioReadBufferIndex = 0;
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m_m17PullAudio = false;
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m_m17PullCount = 0;
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m_m17PullBERT = false;
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m_feedbackAudioBuffer.resize(1<<14);
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m_feedbackAudioBufferFill = 0;
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m_modBuffer.resize(1<<12);
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m_modBufferFill = 0;
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m_magsq = 0.0;
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m_processor = new M17ModProcessor();
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m_processor->moveToThread(&m_processorThread);
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m_processorThread.start();
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applySettings(m_settings, QList<QString>(), true);
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applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
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}
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M17ModSource::~M17ModSource()
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{
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m_processorThread.exit();
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m_processorThread.wait();
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delete m_processor;
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}
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void M17ModSource::pull(SampleVector::iterator begin, unsigned int nbSamples)
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{
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std::for_each(
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begin,
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begin + nbSamples,
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[this](Sample& s) {
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pullOne(s);
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}
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);
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}
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void M17ModSource::pullOne(Sample& sample)
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{
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if (m_settings.m_channelMute)
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{
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sample.m_real = 0.0f;
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sample.m_imag = 0.0f;
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return;
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}
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Complex ci;
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if (m_interpolatorDistance > 1.0f) // decimate
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{
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modulateSample();
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while (!m_interpolator.decimate(&m_interpolatorDistanceRemain, m_modSample, &ci))
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{
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modulateSample();
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}
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}
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else
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{
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if (m_interpolator.interpolate(&m_interpolatorDistanceRemain, m_modSample, &ci))
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{
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modulateSample();
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}
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}
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m_interpolatorDistanceRemain += m_interpolatorDistance;
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ci *= m_carrierNco.nextIQ(); // shift to carrier frequency
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double magsq = ci.real() * ci.real() + ci.imag() * ci.imag();
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magsq /= (SDR_TX_SCALED*SDR_TX_SCALED);
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m_movingAverage(magsq);
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m_magsq = m_movingAverage.asDouble();
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sample.m_real = (FixReal) ci.real();
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sample.m_imag = (FixReal) ci.imag();
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}
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void M17ModSource::prefetch(unsigned int nbSamples)
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{
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if ((m_settings.m_m17Mode == M17ModSettings::M17ModeFMAudio))
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{
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unsigned int nbSamplesAudio = nbSamples * ((Real) m_audioSampleRate / (Real) m_channelSampleRate);
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pullAudio(nbSamplesAudio);
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}
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}
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void M17ModSource::pullAudio(unsigned int nbSamplesAudio)
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{
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QMutexLocker mlock(&m_mutex);
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if (nbSamplesAudio > m_audioBuffer.size()) {
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m_audioBuffer.resize(nbSamplesAudio);
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}
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std::copy(&m_audioReadBuffer[0], &m_audioReadBuffer[nbSamplesAudio], &m_audioBuffer[0]);
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m_audioBufferFill = 0;
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if (m_audioReadBufferFill > nbSamplesAudio) // copy back remaining samples at the start of the read buffer
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{
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std::copy(&m_audioReadBuffer[nbSamplesAudio], &m_audioReadBuffer[m_audioReadBufferFill], &m_audioReadBuffer[0]);
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m_audioReadBufferFill = m_audioReadBufferFill - nbSamplesAudio; // adjust current read buffer fill pointer
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}
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}
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void M17ModSource::modulateSample()
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{
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Real t1, t;
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bool carrier;
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if ((m_settings.m_m17Mode == M17ModSettings::M17ModeFMTone) || (m_settings.m_m17Mode == M17ModSettings::M17ModeFMAudio))
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{
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pullAF(t, carrier);
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if (m_settings.m_feedbackAudioEnable) {
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pushFeedback(t * m_settings.m_feedbackVolumeFactor * 16384.0f);
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}
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}
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else
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{
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pullM17(t, carrier);
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}
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if (carrier)
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{
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calculateLevel(t);
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t1 = m_lowpass.filter(t) * 1.5f;
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m_modPhasor += (m_settings.m_fmDeviation / (float) m_audioSampleRate) * t1;
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// limit phasor range to ]-pi,pi]
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if (m_modPhasor > M_PI) {
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m_modPhasor -= (2.0f * M_PI);
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}
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m_modSample.real(cos(m_modPhasor) * 0.891235351562f * SDR_TX_SCALEF); // -1 dB
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m_modSample.imag(sin(m_modPhasor) * 0.891235351562f * SDR_TX_SCALEF);
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}
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else
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{
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m_modSample.real(0.0f);
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m_modSample.imag(0.0f);
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}
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m_modBuffer[m_modBufferFill] = t1 * std::numeric_limits<int16_t>::max();
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++m_modBufferFill;
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if (m_modBufferFill >= m_modBuffer.size())
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{
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QList<ObjectPipe*> dataPipes;
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MainCore::instance()->getDataPipes().getDataPipes(m_channel, "demod", dataPipes);
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if (dataPipes.size() > 0)
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{
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QList<ObjectPipe*>::iterator it = dataPipes.begin();
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for (; it != dataPipes.end(); ++it)
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{
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DataFifo *fifo = qobject_cast<DataFifo*>((*it)->m_element);
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if (fifo) {
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fifo->write((quint8*) &m_modBuffer[0], m_modBuffer.size() * sizeof(qint16), DataFifo::DataTypeI16);
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}
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}
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}
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m_modBufferFill = 0;
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}
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}
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void M17ModSource::pullAF(Real& sample, bool& carrier)
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{
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carrier = true;
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if (m_settings.m_m17Mode == M17ModSettings::M17ModeFMTone)
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{
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sample = m_toneNco.next();
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}
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else if (m_settings.m_m17Mode == M17ModSettings::M17ModeFMAudio)
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{
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if (m_settings.m_audioType == M17ModSettings::AudioFile)
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{
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// sox f4exb_call.wav --encoding float --endian little --rate 48k f4exb_call.raw
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// ffplay -f f32le -ar 48k -ac 1 f4exb_call.raw
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if (m_ifstream && m_ifstream->is_open())
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{
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if (m_ifstream->eof())
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{
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if (m_settings.m_playLoop)
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{
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m_ifstream->clear();
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m_ifstream->seekg(0, std::ios::beg);
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}
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}
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if (m_ifstream->eof())
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{
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sample = 0.0f;
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}
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else
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{
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m_ifstream->read(reinterpret_cast<char*>(&sample), sizeof(Real));
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sample *= m_settings.m_volumeFactor;
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}
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}
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else
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{
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sample = 0.0f;
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}
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}
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else if (m_settings.m_audioType == M17ModSettings::AudioInput)
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{
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if (m_audioBufferFill < m_audioBuffer.size())
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{
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sample = ((m_audioBuffer[m_audioBufferFill].l + m_audioBuffer[m_audioBufferFill].r) / 65536.0f) * m_settings.m_volumeFactor;
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m_audioBufferFill++;
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}
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else
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{
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unsigned int size = m_audioBuffer.size();
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qDebug("NFMModSource::pullAF: starve audio samples: size: %u", size);
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sample = ((m_audioBuffer[size-1].l + m_audioBuffer[size-1].r) / 65536.0f) * m_settings.m_volumeFactor;
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}
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}
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else
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{
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sample = 0.0f;
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}
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}
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}
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void M17ModSource::pullM17(Real& sample, bool& carrier)
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{
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// Prefetch audio data if buffer is low
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if (m_settings.m_m17Mode == M17ModSettings::M17ModeM17Audio)
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{
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if (!m_m17PullAudio)
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{
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M17ModProcessor::MsgStartAudio *msg = M17ModProcessor::MsgStartAudio::create(
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m_settings.m_sourceCall,
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m_settings.m_destCall,
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m_settings.m_can);
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullAudio = true;
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}
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if ((m_processor->getBasebandFifo()->getFill() < 1920) && (m_m17PullCount > 192))
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{
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M17ModProcessor::MsgSendAudioFrame *msg = M17ModProcessor::MsgSendAudioFrame::create(m_settings.m_sourceCall, m_settings.m_destCall);
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std::array<int16_t, 1920>& audioFrame = msg->getAudioFrame();
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if (m_settings.m_audioType == M17ModSettings::AudioFile)
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{
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if (m_ifstream && m_ifstream->is_open())
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{
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std::vector<float> fileBuffer;
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fileBuffer.resize(1920);
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std::fill(fileBuffer.begin(), fileBuffer.end(), 0.0f);
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if (m_ifstream->eof() && m_settings.m_playLoop)
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{
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m_ifstream->clear();
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m_ifstream->seekg(0, std::ios::beg);
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}
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if (!m_ifstream->eof()) {
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m_ifstream->read(reinterpret_cast<char*>(fileBuffer.data()), sizeof(float)*1920);
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}
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std::transform(
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fileBuffer.begin(),
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fileBuffer.end(),
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audioFrame.begin(),
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[this](const float& fs) -> int16_t {
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return fs * 32768.0f * m_settings.m_volumeFactor;
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}
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);
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if (m_settings.m_feedbackAudioEnable) {
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pushFeedback(audioFrame);
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}
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}
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}
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else if (m_settings.m_audioType == M17ModSettings::AudioInput)
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{
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std::transform(
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m_audioReadBuffer.begin(),
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m_audioReadBuffer.begin() + 1920,
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audioFrame.begin(),
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[this](const AudioSample& s) -> int16_t {
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return (s.l + s.r) * m_settings.m_volumeFactor;
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}
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);
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if (m_settings.m_feedbackAudioEnable) {
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pushFeedback(audioFrame);
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}
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if (m_audioReadBufferFill > 1920) // copy back remaining samples at the start of the read buffer
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{
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std::copy(&m_audioReadBuffer[1920], &m_audioReadBuffer[m_audioReadBufferFill], &m_audioReadBuffer[0]);
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m_audioReadBufferFill = m_audioReadBufferFill - 1920; // adjust current read buffer fill pointer
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}
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}
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullCount = 0;
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}
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}
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else if (m_settings.m_m17Mode == M17ModSettings::M17ModeM17BERT)
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{
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if (!m_m17PullBERT)
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{
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M17ModProcessor::MsgStartBERT *msg = M17ModProcessor::MsgStartBERT::create();
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullBERT = true;
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}
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if ((m_processor->getBasebandFifo()->getFill() < 1920) && (m_m17PullCount > 192))
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{
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M17ModProcessor::MsgSendBERTFrame *msg = M17ModProcessor::MsgSendBERTFrame::create();
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullCount = 0;
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}
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}
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else
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{
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if (m_m17PullAudio)
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{
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M17ModProcessor::MsgStopAudio *msg = M17ModProcessor::MsgStopAudio::create();
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullAudio = false;
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}
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else if (m_m17PullBERT)
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{
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M17ModProcessor::MsgStopBERT *msg = M17ModProcessor::MsgStopBERT::create();
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m_processor->getInputMessageQueue()->push(msg);
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m_m17PullBERT = false;
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}
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}
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// get sample from processor FIFO
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int16_t basbandSample;
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carrier = m_processor->getBasebandFifo()->readOne(&basbandSample) != 0;
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if (carrier) {
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sample = basbandSample / 32768.0f;
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} else {
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sample = 0.0f;
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}
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m_m17PullCount++;
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}
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void M17ModSource::pushFeedback(std::array<int16_t, 1920>& audioFrame)
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{
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for (const auto& sample : audioFrame) {
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pushFeedback(sample * m_settings.m_feedbackVolumeFactor);
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}
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}
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void M17ModSource::pushFeedback(Real sample)
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{
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Complex c(sample, sample);
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Complex ci;
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if (m_feedbackInterpolatorDistance < 1.0f) // interpolate
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{
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while (!m_feedbackInterpolator.interpolate(&m_feedbackInterpolatorDistanceRemain, c, &ci))
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{
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processOneFeedbackSample(ci);
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m_feedbackInterpolatorDistanceRemain += m_feedbackInterpolatorDistance;
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}
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}
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else // decimate
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{
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if (m_feedbackInterpolator.decimate(&m_feedbackInterpolatorDistanceRemain, c, &ci))
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{
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processOneFeedbackSample(ci);
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m_feedbackInterpolatorDistanceRemain += m_feedbackInterpolatorDistance;
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}
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}
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}
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void M17ModSource::processOneFeedbackSample(Complex& ci)
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{
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m_feedbackAudioBuffer[m_feedbackAudioBufferFill].l = ci.real();
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m_feedbackAudioBuffer[m_feedbackAudioBufferFill].r = ci.imag();
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++m_feedbackAudioBufferFill;
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if (m_feedbackAudioBufferFill >= m_feedbackAudioBuffer.size())
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{
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uint res = m_feedbackAudioFifo.write((const quint8*)&m_feedbackAudioBuffer[0], m_feedbackAudioBufferFill);
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if (res != m_feedbackAudioBufferFill)
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{
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qDebug("M17ModSource::processOneFeedbackSample: %u/%u audio samples written m_feedbackInterpolatorDistance: %f",
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res, m_feedbackAudioBufferFill, m_feedbackInterpolatorDistance);
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m_feedbackAudioFifo.clear();
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}
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m_feedbackAudioBufferFill = 0;
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}
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}
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void M17ModSource::calculateLevel(Real& sample)
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{
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if (m_levelCalcCount < m_levelNbSamples)
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{
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m_peakLevel = std::max(std::fabs(m_peakLevel), sample);
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m_levelSum += sample * sample;
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m_levelCalcCount++;
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}
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else
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{
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m_rmsLevel = sqrt(m_levelSum / m_levelNbSamples);
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m_peakLevelOut = m_peakLevel;
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m_peakLevel = 0.0f;
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m_levelSum = 0.0f;
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m_levelCalcCount = 0;
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}
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}
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void M17ModSource::applyAudioSampleRate(int sampleRate)
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{
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if (sampleRate < 0)
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{
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qWarning("M17ModSource::applyAudioSampleRate: invalid sample rate %d", sampleRate);
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return;
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}
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qDebug("M17ModSource::applyAudioSampleRate: %d", sampleRate);
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m_interpolatorDistanceRemain = 0;
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m_interpolatorConsumed = false;
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m_interpolatorDistance = (Real) sampleRate / (Real) m_channelSampleRate;
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m_interpolator.create(48, sampleRate, m_settings.m_rfBandwidth / 2.2, 3.0);
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m_lowpass.create(301, sampleRate, m_settings.m_rfBandwidth);
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m_toneNco.setFreq(m_settings.m_toneFrequency, sampleRate);
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m_preemphasisFilter.configure(m_preemphasis*sampleRate);
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m_audioSampleRate = sampleRate;
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applyFeedbackAudioSampleRate(m_feedbackAudioSampleRate);
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QList<ObjectPipe*> pipes;
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MainCore::instance()->getMessagePipes().getMessagePipes(m_channel, "reportdemod", pipes);
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if (pipes.size() > 0)
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{
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for (const auto& pipe : pipes)
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{
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MessageQueue* messageQueue = qobject_cast<MessageQueue*>(pipe->m_element);
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MainCore::MsgChannelDemodReport *msg = MainCore::MsgChannelDemodReport::create(m_channel, sampleRate);
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messageQueue->push(msg);
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}
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}
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}
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|
|
void M17ModSource::applyFeedbackAudioSampleRate(int sampleRate)
|
|
{
|
|
if (sampleRate < 0)
|
|
{
|
|
qWarning("NFMModSource::applyFeedbackAudioSampleRate: invalid sample rate %d", sampleRate);
|
|
return;
|
|
}
|
|
|
|
qDebug("NFMModSource::applyFeedbackAudioSampleRate: %d", sampleRate);
|
|
|
|
m_feedbackInterpolatorDistanceRemain = 0;
|
|
m_feedbackInterpolatorConsumed = false;
|
|
m_feedbackInterpolatorDistance = (Real) sampleRate / (Real) m_audioSampleRate;
|
|
Real cutoff = std::min(sampleRate, m_audioSampleRate) / 2.2f;
|
|
m_feedbackInterpolator.create(48, sampleRate, cutoff, 3.0);
|
|
m_feedbackAudioSampleRate = sampleRate;
|
|
}
|
|
|
|
void M17ModSource::applySettings(const M17ModSettings& settings, const QList<QString>& settingsKeys, bool force)
|
|
{
|
|
if (settingsKeys.contains("rfBandwidth") || force)
|
|
{
|
|
m_settings.m_rfBandwidth = settings.m_rfBandwidth;
|
|
applyAudioSampleRate(m_audioSampleRate);
|
|
}
|
|
|
|
if (settingsKeys.contains("toneFrequency") || force) {
|
|
m_toneNco.setFreq(settings.m_toneFrequency, m_audioSampleRate);
|
|
}
|
|
|
|
if (settingsKeys.contains("audioType") || force)
|
|
{
|
|
if (settings.m_audioType == M17ModSettings::AudioInput) {
|
|
connect(&m_audioFifo, SIGNAL(dataReady()), this, SLOT(handleAudio()));
|
|
} else {
|
|
disconnect(&m_audioFifo, SIGNAL(dataReady()), this, SLOT(handleAudio()));
|
|
}
|
|
}
|
|
|
|
if (settingsKeys.contains("insertPosition") || force)
|
|
{
|
|
if (settings.m_insertPosition != m_settings.m_insertPosition)
|
|
{
|
|
if (settings.m_insertPosition)
|
|
{
|
|
const MainSettings& mainSettings = MainCore::instance()->getSettings();
|
|
M17ModProcessor::MsgSetGNSS *msg = M17ModProcessor::MsgSetGNSS::create(
|
|
mainSettings.getLatitude(), mainSettings.getLongitude(), mainSettings.getAltitude());
|
|
m_processor->getInputMessageQueue()->push(msg);
|
|
}
|
|
else
|
|
{
|
|
M17ModProcessor::MsgStopGNSS *msg = M17ModProcessor::MsgStopGNSS::create();
|
|
m_processor->getInputMessageQueue()->push(msg);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (force) {
|
|
m_settings = settings;
|
|
} else {
|
|
m_settings.applySettings(settingsKeys, settings);
|
|
}
|
|
}
|
|
|
|
void M17ModSource::applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force)
|
|
{
|
|
qDebug() << "M17ModSource::applyChannelSettings:"
|
|
<< " channelSampleRate: " << channelSampleRate
|
|
<< " channelFrequencyOffset: " << channelFrequencyOffset;
|
|
|
|
if ((channelFrequencyOffset != m_channelFrequencyOffset)
|
|
|| (channelSampleRate != m_channelSampleRate) || force)
|
|
{
|
|
m_carrierNco.setFreq(channelFrequencyOffset, channelSampleRate);
|
|
}
|
|
|
|
if ((channelSampleRate != m_channelSampleRate) || force)
|
|
{
|
|
m_interpolatorDistanceRemain = 0;
|
|
m_interpolatorConsumed = false;
|
|
m_interpolatorDistance = (Real) m_audioSampleRate / (Real) channelSampleRate;
|
|
m_interpolator.create(48, m_audioSampleRate, m_settings.m_rfBandwidth / 2.2, 3.0);
|
|
}
|
|
|
|
m_channelSampleRate = channelSampleRate;
|
|
m_channelFrequencyOffset = channelFrequencyOffset;
|
|
}
|
|
|
|
void M17ModSource::handleAudio()
|
|
{
|
|
QMutexLocker mlock(&m_mutex);
|
|
unsigned int nbRead;
|
|
|
|
while ((nbRead = m_audioFifo.read(reinterpret_cast<quint8*>(&m_audioReadBuffer[m_audioReadBufferFill]), 4096)) != 0)
|
|
{
|
|
if (m_audioReadBufferFill + nbRead + 4096 < m_audioReadBuffer.size()) {
|
|
m_audioReadBufferFill += nbRead;
|
|
}
|
|
}
|
|
}
|
|
|
|
void M17ModSource::sendPacket()
|
|
{
|
|
qDebug("M17ModSource::sendPacket: %d", (int) m_settings.m_packetType);
|
|
|
|
if (m_settings.m_packetType == M17ModSettings::PacketType::PacketSMS)
|
|
{
|
|
M17ModProcessor::MsgSendSMS *msg = M17ModProcessor::MsgSendSMS::create(
|
|
m_settings.m_sourceCall,
|
|
m_settings.m_destCall,
|
|
m_settings.m_can,
|
|
m_settings.m_smsText
|
|
);
|
|
m_processor->getInputMessageQueue()->push(msg);
|
|
}
|
|
else if (m_settings.m_packetType == M17ModSettings::PacketType::PacketAPRS)
|
|
{
|
|
M17ModProcessor::MsgSendAPRS *msg = M17ModProcessor::MsgSendAPRS::create(
|
|
m_settings.m_sourceCall,
|
|
m_settings.m_destCall,
|
|
m_settings.m_can,
|
|
m_settings.m_aprsCallsign,
|
|
m_settings.m_aprsTo,
|
|
m_settings.m_aprsVia,
|
|
m_settings.m_aprsData,
|
|
m_settings.m_aprsInsertPosition
|
|
);
|
|
m_processor->getInputMessageQueue()->push(msg);
|
|
}
|
|
}
|